Code 171
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Mountain Pass
Joined: Jun 2009
Posts: 128
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Code 171
How's it going, just had a code pulled on my rig.. 171 bank 1 running lean. Checked and confirmed all lines are not leaking and there's 18.5 bar for vacuum at the motor and at the end of line on the vacuum system, not sure what next. The truck is running good as far as I can tell, any ideas would be great
Thanks
Thanks
Freshman User
Joined: Sep 2012
Posts: 34
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From: Elkridge, Maryland
Code 171
Is it possible that your bank 1 O2 sensor is/has failed? I've read about O2 sensors failing without codes on here. If I recall correctly, I think a failed O2 sensor could cause a bank to run lean all the time. If the sensors upstream of the cat are the same maybe you can swap them and see if the code follows?
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Caplax40
1983 - 2012 Ranger & B-Series
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Mar 4, 2005 07:58 PM
